Vishvaa Rajakumar, a 20-year-old Indian student, has won the Memory League World Championship 2025.
Rajakumar, a student at Manakula Vinayagar Institute of Technology in Puducherry, stunned competitors by memorising 80 random digits in just 13.50 seconds and 30 images in 8.40 seconds.
According to the Memory League website, Rajakumar is ranked No. 1 with a score of 5,000.
The Memory League World Championship tests participants in various recall tasks, including numbers, words, and images.
This online competition involves competing against each other, and challenges include memorising the order of 80 random numbers displayed on a screen as quickly as possible.
Rajakumar uses the memory palace technique, an ancient method dating back to Roman times. This technique involves associating pieces of information with specific locations, like rooms in a house, and mentally walking through them to recall information in sequence.
Rajakumar called hydration as very important, adding that it helps the brain. He said, “When you memorize things, you usually sub-vocalize, and it helps to have a clear throat. Let’s say you’re reading a book. You’re not reading it out loud, but you are vocalizing within yourself.”
He said that his room, kitchen, hall, and bathroom are his “memory palaces”, where he practices. In his process, Rajakumar explained that he takes a pair of words, makes a story out of them, and then places them in a location.
Next, he takes another pair, makes a story and places it in the second location. According to him, this “memory palace” helps in memorising a sequence.
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On his experience at the Memory League World Championship, Rajakumar said that the contestants are shown 80 random numbers that are displayed on a screen. A participant has to memorise all those numbers as fast as possible.
Rajakumar is not stopping at winning championships. He has big plans to start a memory training institute in India, where he hopes to teach others these advanced memorisation techniques.
